Question

(1) The perimeter of a rectangle is 80 metres and its length is
one metre more than twice the breadth. What are its length and
breadth?​

Answer 1

perimeter is 80

and breadth is twice the perimeter

means

80×2=160

breadth is 160

now length is 1 more than breadth

means 160+1=161

so

breadth is 160

length is 161

perimeter is 80

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Answer 2

Answer :-

If x be the breadth, Then length

= 2x + 1

$\implies\bf \: 2 (x + 2x + 1) = 80$

$\implies\bf \: 2(3x + 1) = 80$

$\implies\bf \: 6x + 2 = 80$

$\implies\bf \: 6x = 80 – 2$

$\implies\bf \: x = \frac{80 - 2}{6} = 13$

$\bf \: breadth = 13 \: metre$

$\bf \: length = 2 \times 13 + 1 = 27 \: metre$